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Simultaneous Measurements of Ku- and Ka-Band Sea Surface Cross Sections by an...

Tanelli, S., S. Durden, and E. Im (2006), Simultaneous Measurements of Ku- and Ka-Band Sea Surface Cross Sections by an Airborne Radar, IEEE Geosci. Remote Sens. Lett., 3, 359-363, doi:10.1109/LGRS.2006.872929.

The dual-frequency Airborne Precipitation Radar-2 (APR-2) was deployed during the Wakasa Bay Experiment in 2003, for validation of the Advanced Microwave Scanning Radiometer–EOS. Besides providing extensive observations of diverse precipitating systems, this Ku-(13.4 GHz) and Ka-band (35.6 GHz) cross-track scanning radar measured sea surface backscatter simultaneously. While the characteristics of the normalized sea surface cross section 0 at Ku-band are well understood and widely published, the existing experimental data concerning 0 at Ka-band are scarce and results are inconsistent. In this letter, the Ku/Ka-band 0 measurements collected by APR-2, together with the estimated uncertainties, are discussed. In general, the measured 0 at Ka-band at around 10 incidence angle appears to be close to that at Ku-band 0 , and Ka-band exhibits a nonnegligible difference in wind dependence with respect to Ku-band for moderate to high winds.

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Research Program: 
Atmospheric Dynamics and Precipitation Program (ADP)
Global Precipitation Measurement